Traveling brush attachment for grain cleaners



NOV. 7, 1939. s A rr-r 2.178.963

TRAVELING BRUSH ATTACHMENT FOR GRAIN CLEANERS Filed July 28,- 1937 2 Sheets-Sheet l 1 1 M m mu 1 .19 MMM'HW 41 Nov. 7, 1939. HAB$TR|TT 2,178,963

TRAVELING BRUSH ATTACHMENT FOR GRAIN CLEANERS Filed July 28, 1937 2 Sheets-Sheet 2 l I 6 I 6 10 v 3 7 a rv- ,24 g 60 F L QYLN r 51 new Patented Nov. 7, 1939 eerie TRAVELING BRUSH ATTACHMENT FOR GRAB\T CLEANERS Stanley J. Habstritt, Bell, Calif.

Application Jilly 28, 1937, Serial No. 156,235

2, Claims.

This invention relates to an improved traveling-brush attachment for cleaning the screens of grain-cleaning machines and the like.

It is an object of the invention to provide a rotary traveling clogless brush and means for rotating the brush during its movement back and forth across the screen which effects a more thorough cleaning of the screen and prolongs the life of the brush.

A further object of the invention is to provide an attachment of the above-mentioned character which is simple and durable in construction,re1iable and efficient in operation and inexpensive to manufacture.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a side elevation of a grain cleaning machine with the attachment applied thereto,

Fig. 2 is a section taken on line AA of Fig. l,

Fig. 3 is a top plan View, partly in section,

Fig. 4 is a perspective view of the brush carrier, and,

Fig. 5 is a fragmentary sectional view of the brush and operating mechanism.

In the drawings, wherein for the purpose of illustration I have shown a preferred embodiment of my invention, the numeral 5 denotes generally a grain cleaning machine having a plurality of cleaning screens 6, each of which 36 is equipped with a cleaning attachment. A cylindrical rack shaft l extends transversely of the frame of the machine below the screen having its ends supported by eccentric boxes consisting of a bracket 8 attached to the frame having a central opening in which is revolubly 40 mounted a collar 9 in which the shaft is eccentrically mounted, so that upon turning of the collar the shaft can be raised or lowered. The ends of the shaft I extend beyond the brackets 45 8 and are equipped with hand wheels H] to facilitate adjustment of the shaft. A brush carrier H consisting of a housing I2 is mounted to reciprocate and oscillate on the rack shaft 7 being provided with a passage l3 through its lower 50 end for the passage of the shaft therethrough. The side walls of the housing l2 are provided with opposed openings M surrounded by external tapered bosses 15 forming bearings for the brush shaft it extending transversely through 55 the housing. A gear wheel I7 is fixedly mounted on the brush shaft within the housing being spaced from the walls of the housing by washers E8. The periphery of the'gear wheel is concaved so that the teeth of the gear wheel firmly mesh with the rack shaft 1 by means of which 5 the brush shaft is rotated upon longitudinal movement of the brush carrier on the rack shaft.

A cylindrical brush head I9 is mounted on each end of the shaft l6 being fixedly secured thereon by set screws 20 and covering the periphery m of the brush head are spaced spiral rows of bristles 2|. The brushes extend transversely across the bottom of the screens at right angles to the rack shaft 1 and upon rotation of the brush shaft the brushes are revolved. 15

In order to move the brush carrier back and forth along the rack shaft 1 I provide a traversing mechanism consisting of a sliding block 22 mounted in a frame 23 at the bottom of the machine. Cords, 24 extend from opposite ends of 2 the block 22 being trained over guide pulleys 25 mounted on the frame of the machine and have their free ends connected to opposite ends of the brush carrier, as at 26. The mechanism for reciprocating the block 22 includes sprocket 25 wheels 2'! located near the ends of the frame 23 around which is trained an endless chain 28. One link of the chain carries a laterally projecting pin 29 which engages in the vertical slot 39 of the sliding block and upon rotation of 30 the sprocket wheels the sliding block'is reciprocated which movement is imparted to the brush carrier through the cords 24. The' sprocket wheels are driven from the main shaft or other moving part of the machine by a speed-reducing gear comprising a bevel gear 31 mounted on the shaft of one other sprocket wheels which meshes with a pinion gear 32 mounted on the shaft of thepulley 33 driven by a belt, not shown.

In operation, the brush carrier is reciprocated on the rack shaft 1 causing thebrush to travel across the bottom of the screens and at the same time the gear wheel ll rotates the brush shaft l6 revolving the brushes which effects a more thorough cleaning of the screens without danger may readily drop as the brushes revolve. By

turning the rack shaft 7 in the eccentric boxes supporting the same, the brushes are raised or lowered to regulate the pressure of the brushes against the screen and when lowered to its full extent the screens may be easily removed from the machine.

It is to be understood that the form of my invention herein shown and described is to be taken as a preferred example of the same and that certain changes in the shape, size and arrangement of the parts may be made Without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. A screen cleaning device comprising a round rack shaft extending across and beneath the screen having annular teeth, a carrier housing having a longitudinal passage through which said rack shaft extends, said housing being capable of reciprocating and oscillating movement on said shaft, a brush shaft extending through said housing at right angles to said rack shaft, a gear wheel fixed on said brush shaft intermediate its ends and in mesh with said rack shaft, brushes carried by said brush shaft on opposite sides of said carrier, and means for reciprocating said carrier along said rack shaft.

2. A screen cleaning device comprising a round rack shaft extending across and beneath the screen having annular teeth, rotatable eccentric bearings supporting the ends of said rack shaft for adjusting said rack shaft towards and from the screen, a carrier housing having a longitudinal passage through which said rack shaft extends, said housing being capable of reciprocating and oscillating movement on said shaft, a brush shaft extending transversely through the carrier housing above said rack shaft and at right angles thereto, said brush shaft being journaled in the sides of said housing, a gear wheel fixed on said brush shaft intermediate its ends and in mesh with said rack shaft, brushes carried by said brush shaft on opposite sides of said housing and means for reciprocating said housing along said rack shaft.

' STANLEY J. HABSTRITT. 

